Brake for automobiles



Nov. 14, 1933. c. R. ROCHE BRAKE FOR AUTOMOBILES Filed June 25, 1929 CrtVENTOR, Cif/y0 Q0 c: he

BY @M M ATTORNEYS.

' duplicatedoneach side'ofthe differential, theref'v greatly increasingthe .brakecapacityfoffthe Patented vNene-'14, :193s f l i.. invention Y'relates-:to brakes;v and yvhile features of the invention may be appliedto brakes usedin anyfsituation Wherejadrive occurs through 1aldifferential mechanism, the invention is ex;-A pected;tobe especiallyus eful When` applied to` automobiles having a foreevvheel drive. `Inthis typeof drive,r Where fore-Wheel brakesere em developed by.thegbrakingfforce atfthe pinion and.

ring gear, tending. tqfwear thegearsld met@ .them rlQiSy The' generalobject `of this invention is tov pro-4 vide a v...brake 4construction`whichcanibe readily applied I on: fore-Wheel driven automobiles' `whichY will make Vit -unneoes'sary to. attach. brake Ydrums l' by.

' ential mechanism. l-

in the "appended' claims;v

' In thefdrawing; 1

directly tothe wheels also to provide laconstructionwhereby the brakeldrumY can be l'readily a'p plied soji as. to., rotate ,withthe driven4Wheel l'of the differential that jcarries the differential spider andfthe, driving pinions .of differential. In.y 'relatively lightautomobiles, .suchjas passenger cars, .a single brakel drum can beemployed, but

when. my brake construction Yis'`applied.`y to heavy trucks, if v.deeired,t her brake construction can; be

automobile;v e

A. further r.object of the invention is to provide aiv brakeconstruction enalclingr f a llfnake v,c ilerr'ie'nt to be readilyconnected to" the; difierential/spider,V butlocated outside oftheliousing forthefdifferf The invention consistsf in the novel parts'and .combinationof partsto be described hereinafter,

all of rwhich'. contribute to `brake f or automobiles.

. A preferred embodiment. ofr the? inventari `is described, in th'e'following speciilcation',while .the broadscope of the inventionis'pointedout Figure isi a verticaljsection taken throughVthe.fdrivi!1g.. mechanism forV `one of i, the Wheels of an automobile,showing portionsofl; the housingY broken atv'ay'and other; partsinelevation.

4Figure '2is alongitudinal section illustrating 4 another embodimentofthe connectionwhich may e UNITED* PATENT?@FFI-CE; v'f1-,934,168 l: 1 ff 21.2 ...BMKE'FOR AUTOMOBILES o'ftmiitReefhe,LeslAngeles, Calif.. I il'zApnlicatioi Jiej 25g- 19295serial Ne. 373,5341 Y f claims.V(olfrl-lsj'j be employed fer eehrieetmgthe differential spider@ 55Referring `more .particularly to .the partsjl driven by. theenginep-V'Ifhis differential. case 1 carriesY the usual drivingfpinions5 mountedto rotate 1on -radial axes radiating from the intersec-L'tionrof the drive, shaft .4 and the shafts 6- and -7 that .actuate theWheels. Thesef-pinions 5. mesh;f i with. bevel gears 8 andQthat-areattached. rej spectivelyg'to the shaftsandI'?, being connectedto the same by` multiple splines such "as indicated bythe .multiplespline loillustrated'in connecsuch as a Worm driveor f. The shafts'fand7 entend out'totvard-each-side of thecary and the construction for.driving' each wheel is substantially the same. As illustrated.inconnectionwith .the shaft 7, rits outer endear- `vriesA avuniversaljdriving Yconnection "11 through which an extensible, shaft 12is rotated, said shaft. being .connected'yvith thewheel hub 13 throughanother .universal connection not illustrated, so

in any position the Wheel may assumevin steering, Orduetofmadshock- I Inthis connection it should be understoodthat thewheel hub is mqpnted.forrotation on vertical shafts- `'14: that. extend upwardly from. a

vknuckle bracket 15 and downwardly, respectively,

being mounted for rotation inball bearings 16l carriedfonthe ends ofsprings 17. l The fdifferential mechanism is supportedWithv"inth'differentialhousing 1s tovwhieh thesprrigs .uFurtherfobjeets' of theinvennenwm appear hereinafter.

arel attached. In applyingemyinvention to such a construction Iprovide.a brake element, preferably in the tion with the shaftl. -Any suitabledriving means,

offset bevel pinion, may Y .Y

forrneof a brake rdrum19,1.Wh`ieh'is located at the 1 l sidezofthehous'ing 18 and which is connected for `rotation Withthedifferentialcase 1. '.In Orl- .derto acomplish this', I provide atubularshaft 20j-that surroundsthev shaft 7 and the inner end of this tubularshaftf20 is connected in any ysuitable manner to the driven differentialWheel 2, or

to the. differential case 1. Y AsY illustrated in Figurev 1,'the innerend of thetubular shaft 20 i sV provided with,y or formed with alrigidilange or f coll'ar2l` which maybe secured by bolts 22A to a-flange 23 on the ydifferential case lfwhich also that illustrated inFigure 2, in which *theV differential case le or an element attached tothe difp ferential case is provided with a projecting hub 24, which isconnected by a multiple spline con-` axis of the car.

however, I may provide. a construction such as nection 25 with a tubularshaft 26.

The differential housing 18 is provided with the usual outwardlyextending'tubular extension 27, which is of vconsiderablylargerydiameter than the tubular shaft 20, and the inner end o this tubularextension may be provided with 'a ball' bearing '28 to support thediierential case 1.l v

The tubular shaft 2O extends beyond the vend of the tubular extension27, -as illustrated, and the flange 29 of the brake drum 19 preferablyprojects inwardly toward `the automobile frame 30,V

that is to say, toward the longitudinal central The outer end ofA the"tubular shaft 20 has a multiple spline connection 31 that connects itto the drum 19.r For this purpose I prefer to employ a collar 32 with atubular neck to receive the spline groovesandconneot this collarto thedrum`19 bolts-33L This construction facilitates formingy the drum 19 outof sheet metaland enables a standard-drumto be ern` vployed.

The outer end of the tubular extension 2731s provided witha bushingr orbearing 34 which centers thetubular shaft 20. If desired, thislbushingmaybe in the form'ofa ball bearing. The housing 18 isattached in somesuitableway to the frame 30.-

' Near 'the-'end of the tubular extension 27, I

provide' a cover` plate' or -dust plate"'35 for they brake drum whichmaybe riveted to, an out- Wardly projecting ange 36-formed on thetubular;eXtension. Beyond this point a dust cap 37 is provided thatscrews onto the threaded end of the tubular extension 27 and is providedwith a packing ringfor'dust ring 3310i packing Amaterial that-slips overthe outer sideof the neck of the hub 32. This packing 381assistsinkeep.e

ing dust from the roa'dfrom passing into the-kv driving mechanismassociated with vthe shaft 7. Any suitablebrake applying 1 means may beprovided for applying a brakingforce `tothe drumA 19. In the presentinstance,jI`have illustrated aninternally expansible brake band 39vactuated by a rotatable pin40 carrying a rigid actuating arm 41 to whicha lbrakeflink` 42 is attached.

In addition tothe dustrring outside dust cap 43 that screws onto thethreaded outer end of the tubular shaft 20, operating to j retain thebushingV 14.* This bushing actsV as a bearing for theV shaftf7 which itholdsin placel bythe collar45, whichlis pressed against an" integralcollar or' shoulder^46 formed'on-'the" shaft 7.

This dust; cap 143. carries agpackingring o r.

dust ring 47 that receives a slip bushing 4.8 that slides over the outerreduced portion "49 of theY shaft 7 and seats against the outer end ofthe v bushing, 44. Thisrslip collar or bushing 48 4may .be securedinplace by a collarf 50 received on upset thread 51, on the outer endofthe shaft 7 Aand locked in place by wire 52 with its end projecting intoa hole in the shaft.

- kThe mode oi operation of the mechanism will now be briefly described.I The drive from` the engine comesA through the shaft i and rotates thedriving ,pinion 3 that is v attached to it. `Thispinion 3 mesheswith theteeth of the driven bevelwheel`2 that is mounted on the 'differentialcase l. The pinions carried 38,11 provideV an by thediierential caseimpart the rotation of the diere'ntial case to the shafts 6 and 7 in theusual manner in differentials. As the Adifferential case 1 and thedriven bevel gear 2 rotate, they `impart their rotation to thetubularshaft 20 and to the brake drum 19 Which it carries. The brake meansforapplying braking force to the drum is carried onthe cover plate 35for the drum and is applied in the usual way by rotating a shaft or pin40 connected with the brake band 39 on the inside of the drum.

It will. be evident that one ofthe advantages ofvmy invention lies invthe, fact that the position inf-which the brake drum isl located givesample spa'cefsoth'at the drum may be made as wideY as l'desi-red. Thisis especially desirable in -brake constructions for trucks, thedesigners ofV whichhave considerable difficulty infinding spacefor-.providing a suicient braking area to insure quick stopping of thetruck. Furthermore, it will be evident that'thelbrake drum constructionand 'tubular shaft 20can be'duplicatedyif desired', on'the otherr sideof the can/thereby increasing the brakingfcapacity if desired. Thislframeand having a vside wall Withan, integral tubularextensionprojecting toward ytheV side of the, automobile, differential drivingmechanism mounted within the differential housing and includingY adriven differential' wheel, d'ierential Y pinions carried thereby, -ashaft 4driven through the pinions for driving Athe adjacent automobilewheel Vandextending through the said tubular extension of the housing, abrake'drum mounted to .rotate-with the diierential Wheel located beyondthe tubular extensioncf.' the housing,

Vand at a distance from said frame member, a

coverplate for the brake vdrum carriedon :the

.v tubularextension of thehousingjand a brake actuating arm mounted onthe cover Vplate and between! the same and said vframe [member to applyabraking force to the brake drumf'V 2. Inabrake construction forautomobiles, the combinationv` of afframaa differential housing'supported on the-frame and having a side wall kist -withran integralAtubular extension projecting toward theside of the automobile,said'tubular extensionjhavinga iiange adjacent its outer end,,differential driving mechanism mounted within the differential housingandy 'including ardriven differential wheel', diiferential pinionscarried thereby, a shaft carried bythe driven differential'wheel andextending through the said tubular extension of the housing; a brakedrum mounted onrthe said shaft. and `fixed against relative rotation onthe same,flocated beyond the v tubular extension of the housing, acover'plate for the brake Vdrum secured to said flangeV and a brake. armVsupported on 'the' cover plate to cooperate with thesame to vapply thebraking force.

3. In a brake construction forv automobiles, the combination of a frame,a differential housing supported on the framey andhaving a sidewallWithan integral tubular extensionV projecting Y l 1,934,763 y toward theside of 'the automobile, diflerential driving mechanism mounted Withinthe differential housing and including a driven diierential VWheel,differential pinionsV carried thereby, an

` outer tubular shaft surroundngvthe same and .connected rigidly withthe said 'dierential Wheel to rotate therewith, a single brake .elementcor'- respondingto both the said wheels mounted on innerV shaftdriven-through the diierential pinf ions for drivingthe automobileWheels, andan the outer shaft and Vfixed against relative rota- Vfor thebrake velement fixed onk the tubular extension, and a brake armsupported on the coverv plate and locatedin said space between the coveryplate andsari'dy sidewall to cooperate with thevsaid brake element toapply braking rforce to the same. Y f

Y 9cA iso ,Y 85gVV fcmFfroN RROCHE. l

